JP2634506B2 - Locking device for door plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for automatically unlocking and locking simultaneously with opening and closing operations of a sliding door or door attached to an entrance or window of a building, or a door plate used for partitioning a room. About.

[0002]

2. Description of the Related Art As a locking device of this kind, a substantially L-shaped latch having a central portion pivotally connected to the upper end of a wire connected to an electric motor at an upper part of a door movably supported from an upper frame is provided. While being fixed to one end, a latch for engaging and disengaging the latch is disengaged at a portion of the upper frame corresponding to the latch position when the door is closed, while constantly urging the latch engaging and disengaging portion via a latch spring. For example, Japanese Unexamined Utility Model Publication No. 53-33599 discloses a locking device in which a door is normally biased in a closing direction by another door opening / closing spring.

According to this locking device for an automatic door, when the electric motor is operated, the latch is first turned by a wire in the unlocking direction against the urging of the latch spring to release the latch from the latch, and then the electric motor is driven. The door is automatically opened against the bias of the closing direction by the door opening and closing spring by the winding force of the wire by the drive of the motor, and when closing the door, releasing the clutch of the electric motor, the door opens and closes the door The spring automatically moves in the closing direction, and at the same time the door is completely closed, the latch automatically engages with the stopper to lock the door. Thus, unlocking and locking are automatically performed simultaneously with the opening and closing operation of the automatic door.

[0004]

However, according to the above arrangement, if the door is to be manually opened for some reason, an extremely complicated operation is required, and there is a major problem that it is difficult to respond immediately.

That is, manually pulling the wire requires a force to overcome the door opening / closing spring force for urging the door in the closing direction, and temporarily using the wire pulling force only to release the latch, Even if an attempt is made to manually move the door against the force of the opening / closing spring, the latch is maintained in the unlocked state because the latch is always urged in the engaging direction with the latch by the latch spring. Due to the difficulties, simultaneous operation is required, and it is not possible to easily open it manually.

Further, since a spring force always acts when the door is opened and closed, the spring for opening and closing the door is apt to settle, and the durability is also poor. Furthermore, the door opening / closing spring needs to maintain the spring force even when the door is closed, and in consideration of the moving distance of the door, it is essential that the spring is considerably long. Space needs to be secured.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can be easily opened and closed without discrimination between automatic and manual operations, and can automatically lock and unlock. An object of the present invention is to provide a locking device for an opening / closing door plate having a simple configuration and excellent durability.

[0008]

In order to achieve the above object, the present invention relates to a locking device for an opening / closing door plate which automatically unlocks and locks when the door plate is opened / closed. Is fixed, is elastically urged in the contraction direction, and has an elastically structured engagement member having a shape such that a part thereof protrudes from the door plate at the time of contraction, and each of an end of the engagement member and one side surface of the door plate A chain member for opening and closing a door plate to which the end is fixed,
The chain member for opening and closing the door plate is hung around, and is fixed to the outside of the door plate corresponding to a pair of rotating members respectively provided at the moving ends of the door plate and a part of the engaging member when the door is closed. And a stopper for engaging and disengaging the protruding portion.

The rotation of the chain member can be performed either manually or electrically.

[0010]

According to the present invention, when the door is opened and closed, the rotating member is rotated manually or electrically to rotate the chain member in either the opening or closing direction of the door, thereby moving the door in the opening or closing direction. When the door plate travels, a part of the engagement member protruding is set so as not to hinder traveling.

Immediately before the door plate is completely closed, the protruding portion of the engaging portion is temporarily extended by the stopper, and when the door plate is completely closed, the protruding portion returns to the contracted state by elastic force and returns to the contracted state. Engage. Thereafter, even if the door plate is directly opened, the engaging member that engages with the stopper does not extend, and the locked state is maintained.

On the other hand, when the lock is released and the door plate is opened, the rotating member is rotated to rotate the chain member in the opposite direction, and the engaging member resists the elastic force due to the tensile force of the chain member. The door plate is automatically disengaged from the stopper and the door plate moves in the opening direction.

That is, in the present invention, the characteristic structure of the engagement member is provided.
By utilizing the structure and the tensile force of the chain member, the unlocking and locking are automatically performed in accordance with the opening and closing operation of the door plate by the chain member.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is an overall view of a sliding door provided with a locking device for an opening and closing door plate according to the present invention. FIG. 2 is an enlarged perspective view showing a main part of the sliding door. FIGS. 3 and 4 show the operation of the locking device. FIG. 5 is an enlarged perspective view of a main part of a locking device showing a second embodiment of the device.

Referring to FIGS. 1 and 2, the upper end of the door plate 20 in the closing direction is engaged with a four-node four-paired link structure in which an elastic force always acts in the contracting direction via a block-shaped pivoting member 23. A pair of even parts of the member 24 is supported so as to freely rotate in a horizontal plane about a support shaft 25.

The support shaft 25 is further provided with a connecting rod 26, one end of the chain 7 is connected to an end of the connecting rod 26, and a pair of the engaging members 24 facing the support shaft 25. One end of a pair of upper and lower connecting rods 27 and 28 is pivotally attached to the portion, and the other end is connected to the chain 7 via a shaft 29.
Is connected to the other end. A long hole 30 is formed in the lower connecting rod 28, and a pin 31 fixed to the block-shaped pivot member 23 is inserted into the long hole 30 so that the pin 31 is inserted into the pivot member 23. The lower connecting rod 28 is slidable in the longitudinal direction, and the engaging member 24 is
Are biased in the contracting direction.

On the other hand, a pair of unillustrated sprocket wheels 8 and 9 meshing with the chain 7 are pivotally supported near an unillustrated upper frame at a movable end where the sliding door 20 opens and closes.
The chain 7 is wound around both sprocket wheels 8 and 9, and the chain 7 is made endless via the engaging member 24. Further, in the illustrated example, a rotation operating device 10 for the chain 7 is provided at the shaft end of a sprocket wheel 8 installed on the open side of the folding door 1. In the rotary operation device 10, a sprocket wheel (not shown) is fixed to the shaft end of the sprocket wheel 8, and an operation chain 11 is wound around the sprocket wheel (not shown). Of course, the sprocket wheel 8 is not limited to the illustrated example, and the sprocket wheel 8 can be rotationally driven by an electric motor or the like, and a rotation mechanism other than the combination of the sprocket wheel and the chain can be adopted even in the operation device. .

Further, a stopper 12 to which a part of the engaging member 24 is engaged when the door plate 20 is closed is formed so as to protrude at an appropriate place of an upper frame (not shown). In the illustrated embodiment, the engaging member 24 is mounted in a horizontal plane perpendicular to the surface of the door plate. However, the engaging member 24 may be mounted in a vertical plane parallel to the surface of the door plate.

In this configuration, when the door plate 20 is closed, the operation chain 11 of the rotation operation device 10 is manually turned in the direction shown by the arrow a as shown in FIG.
The sprocket wheel 8 rotates to move the chain 7 in the direction of the arrow b.
, The door plate 2 is moved rightward in the drawing, and the door plate 20 is closed. Immediately before the door plate 20 is completely closed, the engaging member 24 is guided by the tapered surface of the clasp 22, moves while extending, and exceeds the clasp 22. 24 contracts again by the elastic force of the spring 29 as shown in FIG. In this state, since the horizontally protruding portion of the engaging member 24 is engaged with the stopper 22 even if the door plate is directly opened by hand, the door can be directly opened by hand as long as the chain 7 is no longer operated. Disappears. That is, at the same time as the door plate 20 is completely closed, the door is automatically locked.

On the other hand, when the door plate 20 is to be opened, when the operation chain 11 of the rotation operation device 10 is rotated in the opposite direction to the above, the sprocket wheel 8 rotates and the chain 7 is moved. 1, the engaging member 24 is extended against the elastic force of the spring 29 by the tensile force of the chain 7 as shown in FIG. Door plate 2 smoothly without being done
0 can be moved leftward (opening direction) in the drawing.

FIG. 4 shows another embodiment of the present invention, in which the chain connecting side end 32 of the lower connecting rod 28 of the above embodiment shown in FIG. At the same time, one end of a wire 33 is connected to the end portion 32, and the other end of the wire 33 is fixed to a wire winding roller 34 provided inside the door plate 20 in the direction of finding. The wire winding roller 34 is used for the door plate 20.
It can be rotated from the outside by an unlocking handle 35. In the event of a chain break or the like, if the wire winding roller 34 is rotated using the unlocking handle 35 to wind up the wire 33, The chain connecting end 32 of the rod 28 extends the engaging member 24 against the elastic force of the compression spring 29 to release the engagement with the stopper 22,
Can be unlocked manually.

In the above description, the chain 7 is used as the chain member and the sprocket wheel 8 is used as the rotating member. However, for example, a combination of a friction belt and a friction wheel can be used.

[0023]

As described above in detail, according to the present invention, one end of one chain member is simply connected to a part of a substantially L-shaped latch or an elastically stretchable engaging member,
With a simple mechanism of connecting the other end to the latch, the engaging member or the door plate and rotating the chain member, the opening and closing operation of the door plate can be easily obtained by manual operation or electric operation. There is no urging means, etc., and the unlocking and locking are automatically performed according to the opening and closing operation of the door plate simply by using the latch or the shape of the engaging member, and the reliability and durability of the operation are provided. Is secured. If a manual unlocking mechanism is provided, the lock can be released even in the event of an emergency, which is more effective.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a sliding door provided with a locking device of the present invention.

FIG. 2 is an enlarged perspective view showing an example of the locking device.

FIG. 3 is an explanatory diagram of an operation at the time of locking according to the present invention.

FIG. 4 is an explanatory diagram of the operation at the time of unlocking.

FIG. 5 is a perspective view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 7 Chain 8, 9 Sprocket wheel 10 Rotating operating device 11 Operating chain 12 Stopper 13 Rotating shaft 14 Interlocking rod 15 Long hole 16 Lifting rod 17 Unlocking handle 20 Door plate 21 Support shaft 22 Clasp 23 Block-shaped pivot Member 24 Engagement member 25 Support shaft 26-28 Link rod 29 (Compression) Spring 30 Long hole 31 Pin 32 Chain connection side end 33 Wire 34 Wire winding roller 35 Unlock handle

Claims (4)

(57) [Claims] An unlocking device for an opening / closing door plate, which is automatically unlocked and locked when the door plate is opened / closed, wherein the locking device is partially fixed to an upper edge portion of the door plate and elastically urged in a contraction direction. a shape protruding partially from the door leaf during shrinkage
The engagement member of the telescopic structure with each of the one side surface of the stretchable direction end portion and the door leaf of the engaging member, a single door leaf opening and closing the chain members whose ends are secured, the door leaf opening and closing the chain member A pair of rotating members respectively arranged at the moving end of the door plate, and a part of the engaging member when the door is closed is fixed to the outside of the door plate corresponding to a part of the engaging member, and the same portion protruding portion is provided. A locking device for an opening / closing door plate, comprising: 2. The locking device for an opening / closing door plate according to claim 1, wherein the engaging member is disposed on a vertical surface. 3. The locking device for an opening / closing door plate according to claim 1, wherein the engaging member is arranged on a horizontal plane. 4. The locking device for an opening / closing door plate according to claim 1, wherein the engaging member is an elastic member having a 4-joint 4-pair even link mechanism.